How to Reheat Roast Potatoes

Can You Reheat Roast Potatoes?

I make a big batch of roast potatoes almost every weekend, and there are always a few left staring at me from the fridge the next morning.

The short answer is yes — roast potatoes reheat beautifully, and the oven gives you back that crisp, golden shell almost every time.

The microwave is the one method that consistently lets you down here.

It heats potatoes through fast, but the trapped steam turns that crackly exterior soft and a little rubbery.

If speed matters more than crunch, that same logic applies to other small potatoes — I cover it in how to microwave baby potatoes.

But for roast potatoes specifically, where crispiness is the whole point, I always reach for the oven or air fryer instead.

Here’s how the main reheating methods actually compare, before I walk through each one in detail.

How to Reheat Roast Potatoes in the Oven

Oven reheating takes a bit longer than microwaving, but it’s genuinely worth the extra ten minutes.

I’ve found that starting with a hot, oiled tray, rather than covering potatoes in foil the whole time, makes a huge difference to the finish.

Step-by-Step Oven Method

1. Preheat properly. Set your oven to 400°F (205°C) and let it fully come up to temperature — a cold oven is the main reason reheated potatoes turn out soft.

2. Warm the tray first. Put a rimmed baking sheet in the oven while it heats, then drizzle it with a little oil once hot.

This is the trick I always come back to — the sizzle when the potatoes hit the tray is what recrisps the outside.

3. Spread potatoes in a single layer. Don’t crowd or stack them; overlapping potatoes steam each other and go soft.

4. Reheat uncovered. Skip the foil this time — it traps steam and undoes the crisping you just set up.

Leave them for 10 to 15 minutes.

5. Check the center. Cut one open or use a food thermometer; potatoes should reach 165°F throughout before serving, in line with USDA guidance on reheating cooked leftovers.

How to Reheat Roast Potatoes in an Air Fryer

The air fryer might be my favorite shortcut here — it’s basically a mini convection oven, so you get most of the crisping benefit in a fraction of the time.

Set the basket to 400°F (205°C) and add the potatoes in a single layer; a little overlap is fine.

Reheat for 4 to 5 minutes, then check and give them another 1 to 2 minutes if needed.

Extra oil usually isn’t necessary since the potatoes already have fat clinging to them from the original roast.

It’s the same logic I use for how to reheat hash browns — dry, direct heat is what brings crispy potato dishes back to life, whether they started as wedges, cubes, or shredded hash browns.

Can You Reheat Roast Potatoes in the Microwave?

Technically, yes — you can microwave roast potatoes, I just wouldn’t choose it if crispy edges matter to you.

Place them on a microwave-safe plate, spaced apart, and cover loosely with a microwave-safe lid or wrap.

Heat on the lowest power setting in 60-second bursts, checking after each one, until they’re hot through.

If you’re reheating a store-bought ready meal that includes roasted potatoes, check the package first.

Many ready meals are formulated with extra starch coating specifically so they hold up better in the microwave.

For homemade leftovers, though, expect potatoes that are hot in the middle but pale and a little gummy on the outside.

Season them again once they’re out — a pinch of salt and a crack of black pepper goes a long way toward disguising the texture loss.

Reheating Roast Potatoes From Frozen vs. Refrigerated

How you stored the leftovers changes the reheating time, so it’s worth treating fridge and freezer potatoes differently.

Reheating From the Refrigerator

Cooked roast potatoes keep in the fridge for 3 to 4 days when stored in a covered container.

Straight from the fridge, they only need the standard 10 to 15 minutes in a 400°F oven, or 4 to 5 minutes in the air fryer.

Reheating From Frozen

Roast potatoes freeze surprisingly well for up to about 6 months, though I think texture is best within the first 2 to 3 months.

Reheat them straight from frozen rather than thawing first — thawing releases moisture that makes the potatoes mushy before they even hit the tray.

Add about 5 to 10 extra minutes to your oven or air fryer time when starting from frozen.

Potatoes are dense, starchy vegetables, which is part of why they take a while to heat evenly all the way through.

It’s the same reason raw potatoes need a surprisingly long time to cook in the first place, which I get into in why potatoes take so long to cook.

Tips for Keeping Roast Potatoes Crispy When Reheating

A few habits make a bigger difference than the exact reheating method you choose.

Don’t skip the preheat. Both the oven or air fryer and the tray itself should be hot before the potatoes go in.

Give them room. Crowding a tray or basket traps steam and softens every surface touching another potato.

Skip covering with foil for most of the reheating time; it’s the fastest way to undo crispness you already have.

Add a fresh drizzle of oil if the potatoes look dry or dull before they go back in.

If you actually prefer a softer, fluffier result rather than fully crisp all over, the approach is closer to how I handle how to reheat jacket potatoes — a bit more coverage and gentler heat protects a fluffy center.

No Oven or Air Fryer? Try the Skillet

Heat a splash of oil in a nonstick or cast-iron skillet over medium heat.

Add the potatoes cut-side down where possible, and let them sit undisturbed for 3 to 4 minutes to rebuild a crust.

Flip once, cover loosely for another 2 to 3 minutes to heat the centers, then uncover to crisp again briefly before serving.

Is It Safe to Reheat Roast Potatoes?

Reheating roast potatoes is safe as long as you handle the cooling and storage correctly.

Let potatoes cool for no more than 2 hours at room temperature before refrigerating, according to FoodSafety.gov’s guidance on leftovers.

One important warning to understand: potatoes wrapped tightly in foil while still warm can create a low-oxygen environment where the bacteria that causes botulism can grow if left at room temperature too long.

This is a known concern specifically raised for foil-wrapped baked and roasted potatoes, so don’t leave a covered tray sitting out on the counter.

Get leftovers into the fridge within that 2-hour window, per the CDC’s information on botulism.

When reheating, make sure potatoes reach an internal temperature of 165°F, checked with a food thermometer, before serving, per USDA’s guidance on the temperature danger zone.

I’d also only reheat a given batch once — repeated cooling and reheating gives bacteria more chances to multiply each cycle.

If you or anyone you’re serving is pregnant, elderly, very young, or immunocompromised, follow the 2-hour refrigeration rule strictly, always reheat to a full 165°F throughout, and don’t serve leftovers that have been left out longer than 2 hours — these groups are more vulnerable to foodborne illness and should consult a healthcare professional with any food safety concerns.